2011-10-04: I am now using Exporter::Lite exclusively instead of Exporter. Got bit once by Exporter when using for an OO module due to clash of assigning to @ISA vs 'use base'. +1 for putting it into core.

EDIT 2012-08-08: Nowadays I revert back to Exporter most of the time because Exporter is core. To avoid @ISA issue, one simply needs to import import() instead setting @ISA: